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-rw-r--r--drivers/iio/Kconfig1
-rw-r--r--drivers/iio/Makefile1
-rw-r--r--drivers/iio/test/Kconfig9
-rw-r--r--drivers/iio/test/Makefile7
-rw-r--r--drivers/iio/test/iio-test-format.c198
5 files changed, 216 insertions, 0 deletions
diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig
index 267553386c71..b35e0c33b5e2 100644
--- a/drivers/iio/Kconfig
+++ b/drivers/iio/Kconfig
@@ -85,6 +85,7 @@ source "drivers/iio/light/Kconfig"
source "drivers/iio/magnetometer/Kconfig"
source "drivers/iio/multiplexer/Kconfig"
source "drivers/iio/orientation/Kconfig"
+source "drivers/iio/test/Kconfig"
if IIO_TRIGGER
source "drivers/iio/trigger/Kconfig"
endif #IIO_TRIGGER
diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile
index 1712011c0f4a..2561325aaa74 100644
--- a/drivers/iio/Makefile
+++ b/drivers/iio/Makefile
@@ -38,4 +38,5 @@ obj-y += pressure/
obj-y += proximity/
obj-y += resolver/
obj-y += temperature/
+obj-y += test/
obj-y += trigger/
diff --git a/drivers/iio/test/Kconfig b/drivers/iio/test/Kconfig
new file mode 100644
index 000000000000..679a7794af20
--- /dev/null
+++ b/drivers/iio/test/Kconfig
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Industrial I/O subsystem unit tests configuration
+#
+
+# Keep in alphabetical order
+config IIO_TEST_FORMAT
+ bool "Test IIO formatting functions"
+ depends on KUNIT=y
diff --git a/drivers/iio/test/Makefile b/drivers/iio/test/Makefile
new file mode 100644
index 000000000000..f1099b495301
--- /dev/null
+++ b/drivers/iio/test/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the industrial I/O unit tests.
+#
+
+# Keep in alphabetical order
+obj-$(CONFIG_IIO_TEST_FORMAT) += iio-test-format.o
diff --git a/drivers/iio/test/iio-test-format.c b/drivers/iio/test/iio-test-format.c
new file mode 100644
index 000000000000..55a0cfe9181d
--- /dev/null
+++ b/drivers/iio/test/iio-test-format.c
@@ -0,0 +1,198 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Unit tests for IIO formatting functions
+ *
+ * Copyright (c) 2020 Lars-Peter Clausen <lars@metafoo.de>
+ */
+
+#include <kunit/test.h>
+#include <linux/iio/iio.h>
+
+#define IIO_TEST_FORMAT_EXPECT_EQ(_test, _buf, _ret, _val) do { \
+ KUNIT_EXPECT_EQ(_test, (int)strlen(_buf), _ret); \
+ KUNIT_EXPECT_STREQ(_test, (_buf), (_val)); \
+ } while (0)
+
+static void iio_test_iio_format_value_integer(struct kunit *test)
+{
+ char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
+ int val;
+ int ret;
+
+ val = 42;
+ ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "42\n");
+
+ val = -23;
+ ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-23\n");
+
+ val = 0;
+ ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0\n");
+
+ val = INT_MAX;
+ ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "2147483647\n");
+
+ val = INT_MIN;
+ ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-2147483648\n");
+}
+
+static void iio_test_iio_format_value_fixedpoint(struct kunit *test)
+{
+ char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
+ int values[2];
+ int ret;
+
+ /* positive >= 1 */
+ values[0] = 1;
+ values[1] = 10;
+
+ ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000010\n");
+
+ ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000010 dB\n");
+
+ ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000000010\n");
+
+ /* positive < 1 */
+ values[0] = 0;
+ values[1] = 12;
+
+ ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000012\n");
+
+ ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000012 dB\n");
+
+ ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000000012\n");
+
+ /* negative <= -1 */
+ values[0] = -1;
+ values[1] = 10;
+
+ ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000010\n");
+
+ ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000010 dB\n");
+
+ ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000000010\n");
+
+ /* negative > -1 */
+ values[0] = 0;
+ values[1] = -123;
+ ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000123\n");
+
+ ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000123 dB\n");
+
+ ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000000123\n");
+}
+
+static void iio_test_iio_format_value_fractional(struct kunit *test)
+{
+ char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
+ int values[2];
+ int ret;
+
+ /* positive < 1 */
+ values[0] = 1;
+ values[1] = 10;
+ ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.100000000\n");
+
+ /* positive >= 1 */
+ values[0] = 100;
+ values[1] = 3;
+ ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "33.333333333\n");
+
+ /* negative > -1 */
+ values[0] = -1;
+ values[1] = 1000000000;
+ ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000000001\n");
+
+ /* negative <= -1 */
+ values[0] = -200;
+ values[1] = 3;
+ ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-66.666666666\n");
+
+ /* Zero */
+ values[0] = 0;
+ values[1] = -10;
+ ret = iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000000000\n");
+}
+
+static void iio_test_iio_format_value_fractional_log2(struct kunit *test)
+{
+ char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
+ int values[2];
+ int ret;
+
+ /* positive < 1 */
+ values[0] = 123;
+ values[1] = 10;
+ ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.120117187\n");
+
+ /* positive >= 1 */
+ values[0] = 1234567;
+ values[1] = 10;
+ ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1205.631835937\n");
+
+ /* negative > -1 */
+ values[0] = -123;
+ values[1] = 10;
+ ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.120117187\n");
+
+ /* negative <= -1 */
+ values[0] = -1234567;
+ values[1] = 10;
+ ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1205.631835937\n");
+
+ /* Zero */
+ values[0] = 0;
+ values[1] = 10;
+ ret = iio_format_value(buf, IIO_VAL_FRACTIONAL_LOG2, 2, values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000000000\n");
+}
+
+static void iio_test_iio_format_value_multiple(struct kunit *test)
+{
+ char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
+ int values[] = {1, -2, 3, -4, 5};
+ int ret;
+
+ ret = iio_format_value(buf, IIO_VAL_INT_MULTIPLE,
+ ARRAY_SIZE(values), values);
+ IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1 -2 3 -4 5 \n");
+}
+
+static struct kunit_case iio_format_test_cases[] = {
+ KUNIT_CASE(iio_test_iio_format_value_integer),
+ KUNIT_CASE(iio_test_iio_format_value_fixedpoint),
+ KUNIT_CASE(iio_test_iio_format_value_fractional),
+ KUNIT_CASE(iio_test_iio_format_value_fractional_log2),
+ KUNIT_CASE(iio_test_iio_format_value_multiple),
+ {}
+};
+
+static struct kunit_suite iio_format_test_suite = {
+ .name = "iio-format",
+ .test_cases = iio_format_test_cases,
+};
+kunit_test_suite(iio_format_test_suite);
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-29 17:06:30 +0000